1. Fujian Medical University Union Hospital, Department of Thyroid Surgery, Fuzhou, China
2. Fujian Medical University Union Hospital, Department of Pathology, Fuzhou, China
3. The First Affiliated Hospital of China Medical University, Department of Thyroid Surgery, Shenyang, China
4. Peking Union Medical College, Department of General Surgery, Peking, China
5. Harvard Medical School, Division of Thyroid and Parathyroid Endocrine Surgery, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, United States